1. Ok
2. ...."more the double". 意思完全说不通。
是....."more than doubled" 吧
3. 语法错：过去时。
.....I found that I "had made" five mistakes.
4. has "raised"
或 has been "rising"
第四句has been risen
第四句has been risen rise貌似是不规则变形，第一句不太肯定，要不要改成as a editor
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